[aarch64-port-dev ] RFR: 8242029: AArch64: skip G1 array copy pre-barrier if marking not active

[Andrew Haley]

On 4/8/20 7:22 AM, Nick Gasson wrote:
> Do you think this is safe and worth doing?

Please forgive me for turning this into a rather extreme thought
experiment: if we hand-translate all GC runtime methods into all
targets, we have an NxM problem, #collectors * #targets. So it's hard
to justify without some heavy usage. And also, it means that if any of
these runtime methods change, we'd risk falling behind on AArch64.

Can you show us the assembly instructions that we'd save?

-- 
Andrew Haley  (he/him)
Java Platform Lead Engineer
Red Hat UK Ltd. <https://www.redhat.com>
https://keybase.io/andrewhaley
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